The Calendar hole will go live in approximately 11 days. Why not try and solve it ahead of time?
Fibonacci in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 398th jwalaszek 965 51 372ms 21 Nov 2021 398th Kloppermand 🇩🇰 965 51 530ms 21 Nov 2021 398th lynn 965 51 344ms 21 Nov 2021 398th MatheusAvellar 🇧🇷 965 51 352ms 21 Nov 2021 398th Meowsan91 🇨🇿 965 51 370ms 21 Nov 2021 398th MeWhenI 🇻🇦 965 51 335ms 21 Nov 2021 398th mrondon8 965 51 386ms 21 Nov 2021 398th NewDefectus 🇮🇱 965 51 363ms 21 Nov 2021 398th nwellnhof 🇩🇪 965 51 380ms 21 Nov 2021 398th primo-ppcg 🇹🇭 965 51 372ms 21 Nov 2021 398th sean-niemann 🇺🇸 965 51 376ms 21 Nov 2021 398th shellbertt 🇨🇦 965 51 361ms 21 Nov 2021 398th sisyphus-ppcg 🇦🇺 965 51 363ms 21 Nov 2021 398th ssiquoya 🇷🇺 965 51 393ms 21 Nov 2021 398th thestretivibity 965 51 374ms 21 Nov 2021 398th tomtheisen 🇺🇸 965 51 359ms 21 Nov 2021 398th Trickermand 965 51 361ms 21 Nov 2021 398th voytasify 🇵🇱 965 51 357ms 21 Nov 2021 398th btnlq 965 51 361ms 28 Nov 2021 398th prplz 🇦🇺 965 51 370ms 7 Jan 2022 398th GrayJoKing 🇦🇺 965 51 375ms 17 Oct 2022 398th DialFrost 🇸🇬 965 51 375ms 7 Jan 2023 398th Steffan153 🇫🇮 965 51 391ms 28 Jan 2023 398th peeveen 🇬🇧 965 51 374ms 15 Sep 2023 398th Herbert00709 🇵🇱 965 51 369ms 18 Nov 2023 398th roupiq 🇵🇱 965 51 368ms 19 Feb 2024 398th Mandrzejy 🇵🇱 965 51 369ms 27 Mar 2024 398th jipsong 🇩🇪 965 51 365ms 13 Jun 2024 398th namelessiw 965 51 371ms 13 Jun 2024 398th Jacob385 965 51 370ms 30 Jul 2024 398th pardouin 🇫🇷 965 51 397ms 24 Sep 2024 398th stefangimmillaro 965 51 352ms 24 Sep 2024 398th b-illy 🇬🇧 965 51 333ms 17 Jan 2025 398th Yax42 🇫🇷 965 51 363ms 6 Feb 2025 398th fuzzylojik-golf 🇺🇸 965 51 388ms 2 Jun 2025 398th AdrienHache 🇫🇷 965 51 362ms 7 Sep 2025 398th Decrare 965 51 370ms 11 Sep 2025 398th snoozingnewt 🇨🇦 965 51 375ms 4 Oct 2025 439th Lydxn 🇨🇦 964 23 1,016ms 23 Mar 2021 439th prplz 🇦🇺 964 23 1,040ms 23 Mar 2021 439th sisyphus-ppcg 🇦🇺 964 23 912ms 23 Mar 2021 439th GrayJoKing 🇦🇺 964 23 1,041ms 23 Mar 2021 439th primo-ppcg 🇹🇭 964 23 978ms 24 Mar 2021 439th JayXon 🇺🇸 964 23 938ms 6 May 2021 439th Irratix 🇳🇱 964 23 931ms 4 Jun 2021 439th emgordon154 964 23 783ms 23 Dec 2021 439th btnlq 964 23 1,003ms 1 Feb 2022 439th Steffan153 🇫🇮 964 23 974ms 13 Dec 2022 439th stefangimmillaro 964 23 877ms 10 Mar 2023 439th radarek 🇵🇱 964 23 840ms 21 May 2023 439th sean-niemann 🇺🇸 964 23 931ms 24 Mar 2024 439th error256 964 23 989ms 10 May 2024 439th pardouin 🇫🇷 964 23 967ms 11 Apr 2025 439th DialFrost 🇸🇬 964 23 991ms 13 Apr 2025 439th fuzzylojik-golf 🇺🇸 964 23 988ms 13 Sep 2025 456th achimkrause 964 35 114ms 11 Jul 2018 456th HPWiz 🇳🇿 964 35 122ms 17 Jul 2018 456th yanqui-uxo 964 35 122ms 6 Oct 2018 456th laikoni 964 35 112ms 27 Feb 2019 456th kops-cg 964 35 296ms 8 Apr 2021 456th xnor-gate 964 35 120ms 8 Apr 2021 456th sisyphus-ppcg 🇦🇺 964 35 117ms 3 May 2021 456th rak1507 🇬🇧 964 35 113ms 4 May 2021 456th lynn 964 35 119ms 5 Jun 2021 456th ssiquoya 🇷🇺 964 35 144ms 9 Jun 2021 456th Lydxn 🇨🇦 964 35 116ms 12 Jul 2021 456th JayXon 🇺🇸 964 35 117ms 15 Sep 2021 456th annaproxy 964 35 117ms 4 Jan 2022 456th btnlq 964 35 117ms 4 Feb 2022 456th arjanadriaanse 🇳🇱 964 35 123ms 10 Feb 2022 456th ovs-code 🇩🇪 964 35 154ms 6 Mar 2022 456th GrayJoKing 🇦🇺 964 35 115ms 10 Mar 2022 456th Sakisan 🇧🇪 964 35 119ms 5 Apr 2022 456th Shanethegamer 🇺🇸 964 35 120ms 7 Apr 2022 456th Steffan153 🇫🇮 964 35 121ms 17 Dec 2022 456th betaveros 964 35 124ms 4 Jan 2023 456th ashtraypettingzoo 🇺🇸 964 35 121ms 10 Feb 2023 456th aionescu 964 35 125ms 9 Apr 2023 456th sean-niemann 🇺🇸 964 35 114ms 1 Jul 2023 456th TrueBoxGuy 964 35 122ms 10 Aug 2023 First Prev 401–480 of 9,582 Next Last
